Effect of Molecular Weight On Compressor Performance Reference to the link, I think the reasoning on peripheral Mach number is more adequate than Molecular weight to explain the impact on the shape of performance curves A lighter gas may produce similar effect on curves (reduction of range, curve steepening effect) to that of heavy gas if both are associated to conditions with equivalent Mach numbers
Torque spec changes from nut to bolt head? | Eng-Tips In a torque spec for a typical bolt, washer and nut arrangement, is the proper torque value affected whether it is applied to the bolt head as opposed to the nut? Thanks!
Motor Starting Power Power Factor | Eng-Tips I think you have a misconception somewhere The starting current is still going to be 405 A (at full voltage) regardless of what assumptions you make about power factor The starting power factor has nothing to do with with running load kW 0 36 sounds a little high, but the difference between assuming 0 2 and 0 36 should not be too significant You need to pick a NEMA starting code in the
Relationship between axle torque and wheel torque | Eng-Tips I can see a momentary 'jerk' occuring at the steering wheel (as force is applied through the drive train) that might be caused by an initial difference in axle twist, but I also see the differential almost immediately 'cancelling out' this affect
Pinned Rolling support in Roof Truss (timber) | Eng-Tips Can anybody explain in simple terms for a truss newbie What is the difference between designing a truss with two pinned supports and designing it with one pinned and one rolling?
No of Passes | Eng-Tips What do you want to know? Your number of passes is dependent on the length of pipe you need to affect your temperature difference I can help you if you tell me a little more aout the problem Mass flow rate, required temperature difference, fluid?
Is this application considered Single Shear or Double Shear? The more meaningful distinction between "single shear" and "double shear" has to do with the how the fastener fits bends within the members, how the fastener and nut collar react moments, and the effect of eccentricity These conditions affect the static strength to some degree and may affect the fatigue strength to a greater degree
Internal wind pressure | Eng-Tips So when you get a net difference between a set internal pressure and a different exterior pressure, you get a net pressure applied to the walls of the box This is not necessarily the full internal pressure effect used in ASCE 7
NPSHa vs NPSHr | Eng-Tips No difference, but nothing like seeing it for yourself Note the motor or IC drivers efficiency varies due to cooling requirements and the thinner air, so there is some difference in the systems at different altitudes, but not really any difference in pump performance The pump is isolated from the outside environment by the pressure casing